2001 results about "Circular economy" patented technology

The invention provides artificial soil and a method for land reclamation by the aid of gold mine tailing slag backfill exploitation regions. The method includes carrying out filling and compaction onthe tailing waste slag backfill exploitation regions; uniformly mixing various components of the optimally designed artificial soil with one another and ultimately covering tailing waste slag backfillsurfaces with the novel artificial soil with a certain thickness so as to effectively treat mine tailing. The artificial soil and the method have the advantages that the prepared artificial soil contains abundant nutrient components, the contents of organic matters can be increased, the gas permeability of the soil can be improved, and the artificial soil is excellent in water retention capacityand fertilizer preservation capability and suitable for growth of plants; organic thoroughly decomposed substances come from agricultural and forestry waste, are extensive in source and are easily available, accordingly, solid waste can be comprehensively utilized in a 'reduction, resource utilization and harmlessness' manner, and the artificial soil and the method conform to principles of circular economy; the land occupation problems of tailing ponds and the problems in the aspect of tasks of land reclamation of mined-out regions can be simultaneously solved by the aid of the artificial soiland the method, and the artificial soil and the method have large market spaces.

The invention relates to a process for regenerating cement with waste concrete, comprising following steps: disintegrating and separating waste concrete, treating at temperature being 550-950 Deg. C, disintegrating, sifting, grinding with addictive until the sifting leaving less than 15% with screen of 80 um; or grinding with addictive, separating, and the fineness of final product being less than 15%; or disintegrating waste concrete, separating, heat treating, grinding with addictive until the sifting leaving less than 15% with screen of 80 um; then getting regenerative cement, and the separated material is regenerative material. The invention is characterized by low energy consumption, large productivity, and good stability of cement volume, durability and workability, simple process, small investment, energy saving and environmental friendly.

The present invention relates to continuous copper-smelting oxygen bottom blowing furnace process and apparatus. The continuous copper-smelting process includes smelting high grade copper matte in an oxygen bottom blowing furnace, smelting coarse copper product with the high grade copper matte in one other bottom blowing furnace, producing high iron slag, dressing the furnace slag to obtain copper concentrate and returning to smelting furnace, separating out iron concentrate product and obtaining tailings. The process has short flow path, low investment, low power consumption, low cost, environment friendship and other advantages.

A technological process for preparing active powder concrete by using iron tailing is characterized by performing screening and mechanical-chemical activation to iron tailing, using partial iron tailing after screening as fine aggregate of the active powder concrete, using activated tailing as component of the active powder concrete, and preparing the active powder concrete. The invention substitutes partial cement, quartz powder and silica fume with mechanically-activated iron tailing and fly ash or slag, and quartz sand or river sand with screened iron tailing fine aggregate, and prepares high-strength active powder concrete under standard curing or high-temperature high-pressure curing condition; and compared with conventional method, the invention reduces raw material cost, improves iron tailing comprehensive utilization rate, reduces natural resource consumption amount, and promotes development of ecological environment protection and circular economy promotion.

The invention relates to a recovery processing method of silicon slice cut waste mortar, comprising the following steps: (1) separating solid-liquid components in the silicon slice cut waste mortar; (2) further recovering the remained cutting liquid component in a solid; (3) separating silicon powder and silicon carbide through water flow flotation; (4) recovering the silicon powder; (5) recovering the silicon carbide; (6) coarsely filtering, finely filtering, decoloring, vacuum distilling and dehydrating the recovered cutting liquid, and adding component with corresponding amount for secondary filter. The method can get various recovered products, such as silicon carbide micro powder, cutting liquid and silicon powder, has high recovery rate and recovery profit and can save the cost of the mortar by at least 40 percent; meanwhile, the invention effectively solves the problem of possible secondary pollution caused by single recovery; the cutting function of recovered and treated silicon carbide micro powder is recovered again, thereby changing waste into wealth, realizing the resource reutilization in true sense, and promoting the development of recycling economy; and the method basically realizes the zero emission of waste liquid by reutilizing the treated waste water after combining a sewage treatment process, thereby being beneficial to environment protection.

The invention provides an energy utilization method of carbon dioxide zero-emission type organic wastes, comprising the following steps of: (1) collecting and pretreating raw materials; (2) preparing hydrogen by anaerobic fermentation and purifying hydrogen; (3) fermenting methane and generating power by the methane; (4) treating biogas slurry and fixing carbon dioxide with microalgae; (5) processing biogas residues and planting energy grass; and (6) recycling afterheat. The method is suitable for treating various types of organic wastes, can be used for treating agricultural organic wastes, industrial organic wastes, domestic organic garbage, mud, and the like and the industries of developing new energy, and the like. The method can carry out a concrete application example of cyclic economy, eliminates environmental pollution, obtains clean energy at the same time, has no greenhouse gas emission in the process and can realize three effects of treating wastes, generating renewable clean energy and reducing carbon dioxide emission.

The invention provides a safe and reliable compound conditioner for reducing the heavy-metal mobility and bioavailability of soil or sludge compost and a preparation method thereof. The compound conditioner is a powdery compound prepared by adding heavy-metal auxiliary passivating agent to alkaline agent, wherein, the heavy-metal auxiliary passivating agent includes precipitating agent and absorbing agent; and the compound conditioner comprises the following components by the mixing proportion (weight percentage): 78% to 91% of alkaline agent, 5% to 13% of precipitating agent and 4% to 9% of absorbing agent. The preparation method comprises the following steps: (1) drying and pulverizing one, two or more than two substances among soda-manufacturing waste residue, lime and fly ash and sieving by a 60-mesh sieve to obtain an alkaline powdery substance as the alkaline agent; (2) mixing the alkaline agent, the precipitating agent and the absorbing agent by the above mixing proportion; and (3) drying and pulverizing the mixed products and sieving by a 200-mesh sieve to obtain the powdery compound conditioner. The invention can greatly reduce the environmental risk caused by the prior art and realize the sustainable development of green circular economy, industry and agriculture by recycling the industrial waste at the same time.

The invention discloses an organic-inorganic compound fertilizer and a preparation method thereof. The organic-inorganic compound fertilizer comprises the following raw materials in parts by weight: 25-30 parts of green algae, 12-17 parts of humic acid, 7-12 parts of bagasse mortar, 8-12 parts of saw dust, 7-15 parts of vermiculite, 5-10 parts of filtration mud, 5-10 parts of yeast organic waste water concentrated liquid, 5-8 parts of cane slag, 2-5 parts of sugarcane top and 2-5 parts of microbial strain liquid. The amount of the compound fertilizer organic matter is large than or equal to 55 weight parts, the total amount of NPK inorganic matters is large than or equal to 12 weight parts, the amount of the moisture is less than or equal to 25 weight parts, the effective viable count is large than or equal to 2 hundred million / gram, and the pH is 5.0-8.5. The preparation method comprises the following steps: fermenting twice by using microbial strains; adding inorganic porosity vermiculite, evenly mixing, and naturally drying so as to obtain the organic-inorganic compound fertilizer. Biodegradable agricultural and industrial production waste water, waste slag and sugarcane top regeneration organic matters are fully utilized as the raw materials, thereby improving the acidity and basicity of soil, improving the cation exchange capability (CEC) of the soil, improving the utilization of fertilizer, promoting the growth of crop and increasing the yield of the crop. The organic-inorganic compound fertilizer has the advantages of good ecological benefits and circular economy benefits and can be used as an additional fertilizer for crops such as sugarcane, watermelon and the like.

The invention provides a system for comprehensive utilization of three industrial wastes, mainly relating to the field of energy conservation and emission reduction, in particular to the comprehensive utilization of the three industrial wastes; to realize the objective of energy conservation and emission reduction required by the recycle economy, a system technology targeted at comprehensive utilization of the three industrial wastes of factories is adopted; in the invention, the reactor in the nuclear plant, the boiler in the coal-fired power plant and other types of supercritical boilers are utilized to provide a new cooling and turbine drive mode to solve the issue of industrial discharge of greenhouse gas and other polluting gases; in addition, collected emissions are utilized to produce nuclear fuel, compound chemical fertilizer or feedstuff and other chemical raw materials; moreover, to realize recycling of resources and sustainable utilization of energy, the original three wastes are innovatively applied to nuclear electric power generation. The system is characterized by comprising 10 major links and the beneficial effect thereof lies in utilizing new methods to realize energy conservation and emission reduction and production cost in the late stage of production can be reduced.

The invention discloses a recovering chemical product method with a V, Cr, Fe and P industrial muck in the chemistry field, which comprises the following steps: roasting raw materials; heating and leaching the clinkers; separating ferric oxide from the solution containing V, Cr, Fe and P; crystallizing the solution in order to removing to P; removing P deeply; removing Si; adjusting the acidity of the solution containing V and Cr; extracting V; extracting V reversely; settling V; roasting metammonium vanadate; reducing Cr; settling chromic hydroxide; separating chromic hydroxide from sodium sulfate; removing NH3; getting sodium sulfate crystallization; purifying sodium sulfate mother liquor; adsorbing V, Cr, tertiary sodium phosphate solution with rough tertiary sodium phosphate refining resin and reacting with phosphoric acid; drying and roasting sodium tripolyphosphate; getting V, Cr, Fe and P from the industrial muck containing V, Cr, Fe and P and separating the secondary product of ammoniacal liquor and sodium sulfate in the heat exchange procedure. The invention saves the energy, which adapts to an industrial appliance.

The invention provides a green circular economy technology with coal coking as the main part. The technical scheme of the technology is as follows: a coal coking part, a coal tar processing part, a carbon black part and a part of combined power and thermoelectricity generation by coke oven gas are organically combined to form the relationship of industrial metabolism, symbiosis and coupling; suchmeasures as differentially utilizing tail gas of carbon black, recovering energy of coke drying quenching, reducing, recycling and changing the three wastes into resources, etc., enable resources to be saved, production cost to be reduced and pollution to be lessened; therefore, economic benefits of coal coking enterprises are maximized and the green circular economy technology is realized indeed. The invention also provides an apparatus for realizing the green circular economy technology with coal coking as the main part.

The invention discloses a chemical foamed concrete and a preparation method thereof. The concrete product is prepared by using a cementing material, a foaming agent, a compounded additive and water as raw materials through a chemical foaming principle, and the added compounded additive realizes stable foaming speed stability, uniform bubble diameter and controllability. The chemical foaming preparation method has the advantages of simplicity, low production investment cost, and convenient construction. The foamed concrete product prepared in the invention has the advantages of fireproof property, waterproof property, sound insulation, heat insulation, light weight, high compressive strength and environmental protection. The bulk density, the compressive strength and the heat conduction coefficient of the obtained product are less than 400kg / m<3>, more than 3.5MPa and less than or equal to 0.07W / (M.K) respectively. The above formula adopting alkaline ash comprising alkaline furnace ashes, alkaline slag, alkaline furnace slag and other wastes as raw materials realizes comprehensive utilization of resources, changes wastes into valuables, and accords with the demands of sustainable development of national circular economy.

The invention relates to a rice seedling raising matrix and a production method thereof, and belongs to a seedling raising matrix and a production method thereof. The matrix is prepared by the following formula and method that: the formula comprises 50 to 70 percent of crushed corn stalk of 40 to 60 meshes, 10 to 30 percent of crushed rice straw of 40 to 60 meshes, 5 to 15 percent of farmyard manure of 40 to 60 meshes and 5 to 15 percent of industrial slag powder of 40 to 60 meshes; and the method comprises material preparation, raw material crushing, fermentation, mixing, drying and stirring. The method for producing the seedling raising matrix by using the raw materials such as straws, farmyard manure, slag and the like thoroughly solves the problems of vegetation destroy caused by taking soil for raising seedlings and difficult soil taking, reduces the production processes of taking soil, sieving soil, regulating acid, stirring fertilizers, stirring drugs and the like, and lightens the labor intensity of rice farmers. The method can be applied in rice seedling raising and vegetable and flower seedling raising production, and is a new effective path for making full use of straw resources and realizing energy conservation, emission reduction and agricultural circular economy.

An Internet-based computer-assisted supply-chain management system (SCMS) replaces the archaic commerce systems presently in use. It coordinates just-in-time distribution of items purchased by consumers from a plurality of merchants whereby the inventory in the distribution pipeline is reduced to inventory in transport. It uses regional distributions centers and neighborhood order aggregation facilities for an efficient transfer of items to consumers. Consumers can pick up aggregated orders at an order aggregation facility or have them delivered at a residence. The SCMS phases out conventional checkout registers in favor of web browsers with automatic transaction execution. Retailers can operate with little or no inventory. Window shops facilitate promotion of items and help consumers make selections and decisions with respect to purchases they may be contemplating. The SCMS provides real-time consumption monitoring and forecasts, significantly reduces supply-chain costs and retail prices, promotes economic growth, and minimizes undesirable cyclic economic fluctuations.

The invention discloses a method for regenerating aluminum alloy with target ingredient from scrap aluminum, relates to a scrap aluminum recycling technology and belongs to the technical field of circular economy. The technology, in which the scrap aluminum are taken as a raw material and comprises the steps of iron removal by magnetic separation, pretreatment, melting, melt ingredient detection, calculation, proportioning, and ingredient regulation for finally obtaining the aluminum alloy with the target ingredients, is developed. By adopting the method disclosed by the invention, the recycling of the scrap aluminum is achieved, and the aluminum alloy with the target ingredients can be obtained; and the method has the characteristics of no pollution, high recycling rate, easiness for realization of industrial production and obvious economic and environmental benefits.

The invention relates to a method for preparing active carbon from rice straw. The method comprises taht: (1) the collected rice straw is subjected to alkali cleaning, cleaned to neutrality, dried, and cut or pulverized; (2) the rice straw is added into an activator solution, evenly stirred, soaked for 12 to 24 hours, subjected to solid-liquid separation, cleaned and dried; (3) the rice straw prepared in step (2) is put in a barrate type oven and pre-oxygenated for 1 to 2 hours; (4) the pre-oxygenated rice straw is put in a tube-type carbide furnace, heated for temperature rise under the protection of nitrogen gas, and activated; and (5) the activated rice straw is washed by water till pH is between 6.5 and 7.5, and dried at 105 DEG C to prepare the active carbon. The active carbon prepared by the method has good adsorption performance; the adsorptive value of methylthionine chloride reaches between 200 and 300 mL / g; and the preparation process is simple, economical and environment-friendly, meets requirement of clean production and circular economy development, and has good industrial application prospect.

The invention provides a greenhouse-type double-heat-collecting double-heat-preserving solar-energy heat-pump drying device for drying materials by utilizing solar energy, which comprises a drying unit, a solar-energy heat-collecting unit, an auxiliary heating unit, a condensing and dehumidifying residual-heat recovering unit and an automatic monitoring control unit, wherein the solar-energy heat-collecting unit is formed by a self-heat-collecting unit and an outer heat-collecting unit, and the auxiliary heating unit is formed by a heat pump. Through the drying device, the utilization ratio of the solar energy is effectively improved, the instability of the solar energy is overcome, the continuity of the drying process is ensured, and the drying efficiency is improved. The drying and dewatering processes are clean, sanitary and energy-saving, and the defects of pollution, decoloring, deterioration and energy consumption caused by adopting the conventional sun insolation and the traditional energy-source drying of farm and sideline products and the like can be effectively overcome. The greenhouse-type double-heat-collecting double-heat-preserving solar-energy heat-pump drying device has positive significance for developing new energy sources, improving the processing quality of the farm and sideline products, promoting the recycling economy and protecting the ecological environment.

The invention provides a nano-antibacterial gravure aqueous printing ink, comprising 65-70wt% of water-soluble resin, 15-20wt% of deionized water, 5-10wt% of aqueous organic pigment, 3-6wt% of ethanol, 1-2wt% of antiseptic, 1-2wt% of dispersant, 0-1wt% of slow drying agent, 0.5-1wt% of aqueous levelling agent, 0.5-1wt% of aqueous wax emulsion, 0.5-1wt% of organic amine, and 0.5-1wt% of antifoaming agent. The invention further provides a preparation method of the nano-antibacterial gravure aqueous printing ink. According to the invention, the problems of bad antibacterial effect, impact on people' health, environmentally unfriendly property, etc. of gravure aqueous printing inks in the prior art are overcome, and the nano-antibacterial gravure aqueous printing ink disclosed herein satisfies the idea of green circular economy, has high-efficiency antibacterial property, can effectively cut off the propagation approach of pathogens and guarantee people' health, and has good market prospect, etc.

An Internet-based computer-assisted supply-chain management system (SCMS) replaces the archaic commerce systems presently in use. It coordinates just-in-time distribution of items purchased by consumers from a plurality of merchants whereby the inventory in the distribution pipeline is reduced to inventory in transport. It uses regional distributions centers and neighborhood order aggregation facilities for an efficient transfer of items to consumers. Consumers can pick up aggregated orders at an order aggregation facility or have them delivered at a residence. The SCMS phases out conventional checkout registers in favor of web browsers with automatic transaction execution. Retailers can operate with little or no inventory. Window shops facilitate promotion of items and help consumers make selections and decisions with respect to purchases they may be contemplating. The SCMS provides real-time consumption monitoring and forecasts, significantly reduces supply-chain costs and retail prices, promotes economic growth, and minimizes undesirable cyclic economic fluctuations.

The invention belongs to the technical field of engineering plastic modification, and discloses a polyamide composition and a preparation method thereof. The polyamide composition comprises the following components by weight: 27-95 parts of polyamide, 5-35 parts of a toughening agent, 0-35 parts of an inorganic filler, 0-1 part of a coupling agent, 0-1 part of a lubricant, and 0-1 part of an antioxidant. The polyamide composition prepared by the method provided by the invention has a very low product cost and high price performance while keeping good comprehensive performance, and consumes a large amount of waste polyamide and rubber waste to solve the problem of waste reutilization; therefore, the method is as well a resource reuse engineering with both economic and environmental benefits, and promotes the development of circular economy. The product has strong competitiveness in the market, and can be widely used in the fields of machinery, electronics, automobile, electrical appliances and consumer goods.

An Internet-based computer-assisted supply-chain management system (SCMS) replaces the archaic commerce systems presently in use. It coordinates just-in-time distribution of items purchased by consumers from a plurality of merchants whereby the inventory in the distribution pipeline is reduced to inventory in transport. It uses regional distributions centers and neighborhood order aggregation facilities for an efficient transfer of items to consumers. Consumers can pick up aggregated orders at an order aggregation facility or have them delivered to a residence. The SCMS phases out conventional checkout registers in favor of web browsers with automatic transaction execution. Retailers can operate with little or no inventory. Window shops facilitate promotion of items and help consumers make selections and decisions with respect to purchases they may be contemplating. The SCMS provides real-time consumption monitoring and forecasts, significantly reduces supply-chain costs and retail prices, promotes economic growth, and minimizes undesirable cyclic economic fluctuations.

The invention provides a preparation method of a reinforced straw fiber composite material. The preparation method comprises the following steps: 1) pre-processing straw fibers; 2) modifying the straw fibers; 3) mixing the straw fibers; 4) thermally pressing and molding; and 5) packaging products. The preparation method disclosed by the invention has the advantages of being simple, reliable, and easy to implement; the prepared composite material is high in utilization rate of straw fibers, can be regenerated and degraded to become an environment-friendly and energy-saving ideal material, and is recycled, so that an industrial chain of circular economy is formed. The reinforced straw fiber composite material is good in mechanical performance, excellent in performance, low in cost, wide in use, and capable of being used to the industry fields such as buildings, home furnishing and cars.

The invention relates to a green circular recycling technology of waste aluminum ring-pull cans, belonging to the technical field of circular economy. A technology for preparing aluminum alloy used for producing ring-pull cans from waste aluminum ring-pull cans as a raw material through the procedures of crushing, magnetic separating and iron removing, paint removing, smelting, component adjusting, filtering and casting is developed. The pollution-free relegation circular recycling of the waste ring-pull cans is achieved through low-oxygen-partial-pressure hot paint removing, undersurface smelting, online component analysis and adjusting, modification, filtering and casting. The method has the characteristics of environment protection, relegation recycling and easiness for industrial production and has significant economic, environmental and social benefits.

The invention relates to a preparation method of a modified bagasse cellulose based heavy metal adsorbent. The preparation method comprises the technological steps of: defibering natural fibers, washing with distilled water and ethanol, stirring and activating in NaOH solution, putting the fibers into dimethyl sulfoxide for water-bath heating and gelatinization, adding deionized water and initiators, feeding in nitrogen for initiation and adding acrylic acid monomers for reaction to obtain graft copolymerization products; adding polyethylene polyamine monomers for reaction, washing and drying to obtain crude cellulose based heavy metal adsorbent; and washing with deionized water, soaking and rinsing in ethanol, rewashing with deionized water, extracting by using acetone and drying to obtain the refined heavy metal adsorbent. The preparation method provided by the invention has the advantages that the method is simple, the cost is low, the environmental friendliness is good, the adsorption effect is excellent, the method is compliant with the concept of circular economy and sustainable development, the problem of secondary pollution caused by bagasse combustion is solved, the water bodies which are polluted by heavy metals are purified and the economic advantage is remarkable.

The invention discloses a method for comprehensively utilizing red mud, comprising the following steps: chloridizing roasting, namely roasting the mixture of the red mud, coal and calcium chloride; cinder treatment, namely obtaining magnetic iron slag and non-magnetic slag after magnetic separation is carried out to levigated cinder, and then separating the magnetic iron slag and non-magnetic slag; adding calcined soda or oxalic acid after levigation liquid and wash water are rich in mischmetal due to cyclic use, and then precipitating mischmetal slag; treatment of dry dust and circulation liquid, namely, after dry powder for roasting dust collection is collected, mixing the dry powder with scouring water which is used for tail gas circulation and then leaching soluble ScCl3 and GaCl3; after filter pressing, precipitating scandium by adding oxalic acid crystal in filtrate; carrying out filter pressing again, precipitating gallium and Ti(OH)4 by adding ammonia into the filtrate, dissolving obtained gallium-titanium slag with acid and then using P2O4 extractant to extract the gallium; and using extractant to extract the scandium after scandium precipitate is dissolved by acid, carrying out precipitation again by adopting back-extraction acid dissolving, and obtaining Sc2O3 by means of roasting. The method can realize recovery of valuable metals from the red mud, and secondary residual slag is totally used for building material production; and the method has environment protection effects and economic benefits, plays an important role in the development of recycling economy and is applicable to enterprises generating red mud.

The invention discloses a modification and innocuous treatment method of phosphogypsum, comprising the following steps: (1) cleaning, (2) neutralizing, (3) dehydrating, (4) calcining, and (5) packaging. The modified phosphogypsum prepared by the invention is a raw material for building material, can be used for preparing a phosphogypsum high strength cement fiberboard. The modified phosphogypsum sandwich panels prepared by the phosphogypsum high strength cement fiberboard can be applied in wall material, floor and roof panel, and has the advantages of good antifreezing performance, thermal insulation performance, heat shielding performance, corrosion resisting performance, fireproof performance, high intensity, light specific gravity, easiness in installation and the like. According to the invention, the waste residue phosphogypsum of phosphorus chemical enterprises are recycled through modification treatment and can be used for producing building materials after recycling, so that the national energy saving policy and the development direction of circular economy are satisfied; even temporarily unable use occurs because of investment or other reasons, the modified phosphogypsum can be stored in long term without environmental hazard, so that the harmlessness is realized.

The invention belongs to the field of nonferrous metal, in particular to a process and a device for treating decopperized slag by adopting a bottom-blowing molten pool to produce wet lead and raw copper. A bottom-blowing smelter hearth is utilized to smelt decopperized slag to produce wet lead, furnace slag and lead copper matte, ferrum-silico-calcium slag is produced in the smelting process, the furnace slag serves as building material factory raw materials after meeting the disposal slag requirements, and a bottom-blowing converting furnace is utilized to convert the lead copper matte to produce raw copper. The process has low energy consumption, long service life of the furnace, high metal recovery efficiency, low product cost, high smelting environment protectiveness , easy realization of automatic control of process, and high labour productivity; the disposal slag contains low-grade valuable metal, and therefore, the disposal slag can be comprehensively utilized as raw materials in building material industry, which accords with the recycling economy principle.

The invention discloses an organic recycling agriculture production system with high efficiency, which uses food obtained from planted crops for feeding livestock, manure produced by which is fermented so as to produce biogas, biogas residue and biogas slurry, wherein, the biogas can be used as clean energy, while the biogas residue and biogas slurry are applied to cultivated lands or grass lands; the planted forage and crop stalks can be used for raising cattle or earthworm after grinded together with cattle manure; the earthworm can be extracted to produce plant growth enhancer, protein feed and biologic products; the earthworm manure can be used as highly effective organic fertilizer to be applied to farm lands or grasslands. The organic recycling agriculture production system of the invention abides by the theory of agriculture circular economy, utilizes nature resource fully and reasonably, promotes resource regeneration, forms virtuous circle of multi-grade utilization of material and energy, and thus is a modern agriculture technique with high quality, high yielding, high efficiency, low consumption and environment protection as well.

The invention provides a method for directly producing high-purity electronic level cobaltous sulfate by using cobalt-containing waste, in particular a process for producing cobaltous sulfate by using cobalt-containing waste. The method comprises the steps of: checking and classifying raw materials, wet-milling and size-mixing, acid-decomposing, filtering, washing, separating, and extracting copper sponge. The method is characterized by also comprising the steps of: removing iron with a goethite process, extracting P2O4 and removing impurities, separating nickel from cobalt, extracting N235, purifying, concentrating and crystallizing. The high purity electron level cobaltous sulfate is directly regenerated by using various kinds of cobalt wastes, the requirement of the modern high-technology industry on high purity of the cobaltous sulfate is met; the total recovery of the cobalt is higher than or equal to 98 percent; various usable elements can be comprehensively recycled, and coppersponge, tungsten carbide, iron hydroxide and nickel carbonate can be regenerated while the electronic level cobaltous sulfate as a main product is regenerated. The invention has the advantages of comprehensively utilizing waste cobalt resources, recycling the wastes, improving the enterprise benefit, and being beneficial to the development of energy conservation, emission reduction, environment protection and circular economy.

The invention provides an energy utilization system of organic wastes with zero emission of carbon dioxide, which organically combines anaerobic fermentation hydrogen production, methane fermentation, CO2 absorption, microalgae fixation CO2, biogas liquid treatment and energy grass planting. The system is suitable for treating various types of organic wastes, can be applied to the treatment of agricultural organic wastes, industrial organic wastes, domestic organic wastes, slurry and the like, and the industries, such as new energy development. Through the application of the invention, the specific application demonstration of recycling economy can be carried out, clean energy is obtained while eliminating environmental pollution, no greenhouse gas emits in the process, and the triple effects of wastes treatment, production of clean and renewable energy sources and reduction of carbon dioxide emission can be realized.